أسئلة الإختبارت القصيرة للفيزياء 001 َquizes

السلام عليكم,

مرفق أسئلة الإختبارت القصيرة للفيزياء 001 َquizes.

دعواتكم

ابوعمر

1. Q1. Chapter 11 The atomic bomb is an example of uncontrolled nuclear chain reaction.

T F

2. Q2. Chapter 11
The element Americium-241 (atomic number = 95) decays into Neptunium-237 (atomic number = 93) with the emission of heat and

A. a proton.
B. a beta particle.
C. a neutron.
D. an alpha particle.

3. Q3. Chapter 11
Which of the following are used as tracers to study chemical reactions and molecular structures?

A. Film badges.
B. Noble gases.
C. Radioisotopes.
D. Fission reactions

4. Q4. Chapter 11
When the _____ is not large enough to hold a nucleus together tightly, the nucleus can become radioactive.

A. isotope
B. tracer
C. strong force.
D. electric force

5. Q5. Chapter 11 Radioactive isotopes that are put into the body to monitor a bodily process are called tracers. T F

6. Q6. Chapter 6 Helium (He) is the second element in the periodic table. Instead of being placed next to Hydrogen (H), it is placed on the extreme right of the table with group 18 elements (noble gases) because

A. Their atomic numbers are different.
B. Hydrogen is more abundant than Helium.
C. Helium is chemically most similar to group 18 elements.

7. Q7. Chapter 7 Which of the following statements is FALSE?

A. Elements of the same group have similar chemical properties.
B. Noble gases are generally not reactive.
C. The elements in the Periodic Table are arranged according to their mass numbers.
D. Most of the elements in the Periodic Table are metals.
E. Across any period, the atomic size tends to decrease as one moves from left to right.
8. Q8. Chapter 6 If two neutrons are added to the Nitrogen nucleus, the resulting element is

A. Magnesium.
B. Nitrogen.
C. Fluorine.
D. Chlorine.
E. Boron.

9. Q9. Chapter 6 Most elements in the periodic table are

A. metalloids.
B. halogens.
C. metals.
D. noble gases.
E. nonmetals.

10. Q10. Chapter 6 Nonmetals are…

A. malleable.
B. shiny.
C. good conductors of heat and electricity.
D. very poor conductors of electricity and heat.

11. Q11. Chapter 5 Which of the following statements is TRUE?

A. The maximum number of electrons in the second principal energy level of an atom is 2.
B. The German scientist W. Heisenberg recognized that it is impossible to know both the exact position and velocity of an electron at the same time.
C. The mass of an electron is about equal to the mass of a proton.
D. The two isotopes, Carbon-12 and Carbon-14, have the same number of neutrons.

12. Q12. Chapter 11 Both fusion reactions and fission reactions

A. cause chain reactions.
B. take place at room temperature.
C. produce energy.
D. are chemical reactions.

13. Q13. Chapter 11 If the half-life of a certain radioisotope is 24 hours, how
long will it take for 75% of the sample to decay?
A. 48 hours.
B. 36 hours.
C. 12 hours.
D. 60 hours.

 

14. Q14. Chapter 5 Atoms of the same element with different numbers of neutrons are called?

A. isotopes.
B. metalloids.
C. radioactive elements.compounds.
D. metals.

15. Q15. Chapter 15 According to Bohr, the number of energy sublevels in an
atom depends on which of the following?
A. the atomic number.
B. the number of valence electrons.
C. the principle energy level.
D. the weight of an atom.

1. Q1. Chapter 12 If you ride your bicycle along a straight road for 500 m and then
turn around and ride back for 200 m along the same road. The
distance covered is _____ the displacement.
A. is greater than
B. is not related to
C. is equal to
D. is less than

2. Q2. Chapter 12 3 m/s north is an example of

A. speed
B. velocity
C. acceleration
D. position

3. Q3. Chapter 12 Acceleration is the rate of change of

A. time
B. force
C. velocity
D. position

4. Q4. Chapter 12 A line’s slope on a distance-time graph can be used to calculate

A. The speed of a moving object.
B. The direction of a moving object.
C. The acceleration of a moving object.
D. The position of a moving object.

 

 

5. Q5. Chapter 12 A person walks 3 km north, then 3 km east, then 3 km south, then 5 km west. What is i) the total distance and ii) the total displacement of this person?
A. i) 2 km ii) zero
B. i) 14 m ii) 2 km to the west.
C. i) 9 km ii) 2 km to the east.
D. i) 14 km ii) 2 km to the east.

6. Q6. Chapter 12 A car moves along a circular race track with a constant speed of 50 km/h. What is its average speed during one full circle?

A. 100 km/h
B. 0 km/h
C. 50 km/h
D. 500 km/h
E. 25 km/h

7. Q7. Chapter 13 A falling object is encountering air resistance. At the moment the object reaches its terminal speed,

A. air resistance becomes zero.
B. the falling object starts to slow down.
C. the falling object starts to fall faster.
D. the acceleration of the falling object is zero.

8. Q8. Chapter 13 A gravitational force is exerted between two objects. How does
this force change if the mass of each object is doubled?

A. The gravitational force becomes four times smaller.
B. The gravitational force does not change, it remains the same.
C. The gravitational force becomes four times larger.
D. The gravitational force becomes two times larger.

9. Q9. Chapter 13 A canoe (a light boat) has a mass of 45 kg and a person (sitting inside) has a mass of 75 kg. If the person jumps out of the canoe (initially at rest) into the water, who will have a larger acceleration, the person or the canoe?

A. The person.
B. Both would have equal accelerations.
C. The canoe.

The canoe has a greater acceleration because the forces on the person and the canoe are the same (action and reaction forces), but the canoe has smaller mass, so it will have larger acceleration.

 

10. Q10. Chapter 13 A gravitational force is exerted between two objects. How does this force change if the distance between the objects is doubled?
A. It becomes four times larger.
B. It becomes four times smaller.
C. It becomes two times smaller.
D. It does not change.

11. Q11. Chapter 13
A 2.5-kg object is resting on a horizontal frictionless (no friction) surface. Two forces are applied on the box as shown in the figure below. What is the box's acceleration? (Note: m/s/s = m/s2)

A. 27 m/s/s/
B. 4.3 m/s/s
C. 4.8 m/s/s
D. 0.48 m/s/s

12. Q12. Chapter 13 Action-reaction forces always

A. act on the same object.
B. are in the same direction.
C. act on different objects.

13. Q13. Chapter 13 If the forces acting on an object at rest are
__________ , the object will remain at rest.
A. balanced
B. all along the same direction
C. unbalanced
D. equal

14. Q14. Chapter 13 ,What is used to reduce friction by filling in bumps and ridges on a surface?

A. sand
B. ball bearings
C. oil
D. tire chains

15. Q15. Chapter 13 In which of the following cases the net force is not equal to zero? An object

A. Moving in a straight line with constant speed
B. at rest.
C. moving with constant speed in a circle.

 

1. Q1. Section 15.1 The work done in holding a weight of 40 N at a height of
3 meters above the floor for 2 seconds is

A. 40 J
B. 120 J
C. 0 J
D. 80 J
E. 240 J

 
2. Q2. Section 15.1, When an object is lifted 10 m, it gains a certain amount of potential energy. If the same object is lifted 20 m, its potential energy gain is

A. the same.
B. less.
C. need more information.
D. four times as much.
E. twice as much.

3. Q3. Section 15.1, A 1000-kg car and a 2000-kg car are raised by the same distance in a gas station. Raising the more massive car requires

A. twice as much work.
B. same amount of work.
C. need more information.
D. four times as much work.
E. less work.

4. Q4. Section 15.1
The gravitational potential energy of an object is due to the object's

A. acceleration.
B. momentum.
C. physical properties.
D. location.
E. speed.

5. Q5. Section 15.1
A 17.0-kg object has 100 J of gravitational potential energy. What is the height of this object relative to the ground. Use g = 9.8 m/s2 and express your answer to within one decimal place. Use symbols (not words) to express units

Answer: Units:

6. Q6. Chapter 16
What type of energy is used when the body’s nerves conduct impulses?

A. Chemical
B. Electrical
C. Thermal
D. Nuclear

7. Q7. Chapter 16 Power plants typically convert what percentage of a fuel’s
energy into electricity?
A. 50%
B. 35%
C. 15%
D. 60%

 
8. Q8. Chapter 16 The potential energy of a box on a shelf, relative
to the floor, is a measure of
A. All of these.
B. The energy the box has because of its position above the floor.
C. The weight of the box times the distance above the floor.
D. The work done to put the box on the shelf.

9. Q9. Chapter 16 Refer to table (figure) 16.21 (page 276 in the
textbook). Which of the following statements is FALSE?

A. Wind power is renewable.
B. Nuclear energy creates hazardous radioactive wastes.
C. Solar cells are expensive.
D. Wind power does not create pollution.
E. Coal is a renewable energy resource.

10. Q10. Chapter 16 Units of energy can be expressed in

A. All of these
B. KWh [KiloWatts-hour]
C. W.s [Watt.second]
D. N.m [Newton.meter]
E. Joules

11. Q11. Chapter 16 The total energy of an object at rest must be zero.

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General Feedback: At least, it may have gravitational potential energy.

12. Q12. Chapter 16 The most widely used source of energy today is

A. Coal.
B. Geothermal energy.
C. Moving (flowing) water.
D. Petroleum.
E. Nuclear.

13. Q13. Chapter 16 Flowing (or falling) water can be used to produce

A. Thermal energy
B. Geothermal power
C. Wind power
D. Solar energy
E. Hydroelectric power

 
14. Q14. Chapter 16 The law of conservation of energy states that

A. Energy can be changed in form, but not created or destroyed.
B. Energy should be saved because it is easily destroyed.
C. Useful energy is always equal to wasted energy.
D. Energy must not be used up faster than it is created, otherwise the supply will run out.

15. Q15. Chapter 16, Using an item more than once saves the energy needed to make it. This is one way used to conserve energy known as

A. Reducing.
B. Reusing.
C. Recycling.
D. Reversing.

1. Q1. Chapter 19 Which one of the following is a mechanical wave?

A. X-rays
B. Infrared waves
C. Gamma rays
D. Seismic waves

2. Q2. Chapter 19 The amount of time needed for one wavelength
to pass a given point is called the ............ of a wave.
A. wavelength
B. frequency
C. speed
D. period

3. Q3. Chapter 19 Wave A carries more energy than wave B. Then
wave A has a bigger ........... than wave B.
A. frequency
B. wavelength
C. amplitude
D. speed

4. Q4. Chapter 19 Sound wave A has a frequency (f), sound wave
B has a frequency (10f) and both travel in the
same medium. Which one has a higher speed?
A. Both have the same speed
B. Wave B
C. Wave A

5. Q5. Chapter 19 In a transverse wave, the distance from the rest position to
either a crest or a trough is called ........
A. Wavelength
B. Amplitude
C. Compression
D. Rarefaction

6. Q6. Chapter 20 A sound intensity above ....... may cause
permanent hearing damage.
A. 150 dB
B. 85 dB
C. 30 dB
D. 120 dB

7. Q7. Chapter 20 What must happen for the Doppler effect to occur?

A. Only the listener must be moving
B. Only the sound source must be moving
C. Both, the source and the listener, must be moving
D. Either the sound source or the listener must be moving

8. Q8. Chapter 20 By increasing the temperature of air by 1 oC
(one degree Celsius), the speed of sound will increase by
A. 0.6 m/s
B. 0 m/s
C. 1 m/s
D. 331.4 m/s

9. Q9. Chapter 20 Sonar is a technology that makes use of which of the following?

A. Doppler shift
B. interference
C. Echoes
D. beats

10. Q10. Chapter 20 For a sound wave, the amplitude can be determined by

A. The density of the particles in the compressions and rarefactions.
B. The distance from the rest position to either a crest or a trough.
C. For a sound wave there is no amplitude.

11. Q11. Chapter 21 Oscillating electrons generate changing

A. both, electric and magnetic fields.
B. gravitational field
C. both magnetic and gravitational fields.
D. electric field.
E. magnetic field.

12. Q12. Chapter 21 Which one of the following statements is true?

A. Electromagnetic waves are longitudinal waves.
B. All matter emits electromagnetic waves.
C. The speed of electromagnetic waves in water is larger than in vacuum.
D. Gamma rays travel faster than Radio waves in space.

 
13. Q13. Chapter 21 Which one of the following statements is FALSE?

A. The speed of a wave= frequency x wavelength
B. In electromagnetic waves, the electric field is always perpendicular to the magnetic field.
C. Electromagnetic waves can transfer energy and matter from one place to another.
D. The speed of infrared waves in vacuum is 300,000 km/s.

14. Q14. Chapter 21 CFCs (Chlorofluorocarbons) react with and destroy
............ molecules in the atmosphere.
A. ozone
B. carbon dioxide
C. nitrogen
D. oxygen
E. hydrogen

15. Q15. Chapter 20 , If the universe is expanding, then according to Doppler effect, the visible light coming from galaxies must be shifting toward the ..........

A. the violet.
B. the ultraviolet.
C. the red.
D. the radio waves.